Upgrade From Ax-4.0 To Ax-2009

Hi Sir, I m doing Upgrade Project From AX-4.0 to AX-2009 I have completed my code upgrade. While doing data Upgrade I have done my pre synchronization with 100% Syncronization also completed with some warning and info. But while running the post synchronization i cant able to complete. It is getting struck to one of the job and it is not getting completed even i left it for 2 days also Ya but after 2 days if i cancle the status and run the post synchronization again the it is completing with 100%… I m using windows server operating system R2 with service pack 2 and SQL-2005 , AX-2009 , Ax-update, and India Localization. There is no error.This job is in executing state… The job is as follow: Updating InvoiceRefRecId of the table SalesLine with the corresponding Recid of the table CustInvoiceTrans. (this job is in executing state for 2 days if i left it ) JobSucceded:455(94.59%) TotalNumberOf Jobs:481 Jobs with error:0 Plz Help… Warm Regards Shankar